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-Tidal and Wave Energy-. Steven Martinez Matthew Notta Bradlee Burnham. -History of Tidal Energy-. 787: simple technique of a waterwheel by the Spanish, French, and British 1966: “La Rance” tidal power plant went in operation.

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steven martinez matthew notta bradlee burnham

-Tidal and Wave Energy-

Steven Martinez

Matthew Notta

Bradlee Burnham

history of tidal energy
-History of Tidal Energy-
  • 787: simple technique of a waterwheel by the Spanish, French, and British
  • 1966: “La Rance” tidal power plant went in operation.
  • 2001: British Parliament states “the world can no longer neglect the massive potential of wave and tidal energy”
  • 2002-present: Large investments in research and prototypes spark proposals in Turkey, China, and United States; among others
history of wave energy
-History of Wave Energy-
  • 1799: First patent of a device designed to use ocean waves to generate power
  • 1910: First oscillating water column was built by Bochaux-Praceique to power his house
  • 1940s: Yoshio Masuda experimented with many concepts of wave power
  • 2004: Wave power was delivered to an electrical grid for the first time
tidal stream generators
-Tidal Stream Generators-
  • Very close in concept to traditional windmills
  • Most popular prototype on the market
  • Prototype sites include Norway, England, and New York.
    • In 2007 8 prototype turbines where placed in the East River between Queens and Roosevelt Island.
      • It is the first major tidal power project in the USA
      • Powers 1/3 of a parking garage and a supermarket
seagen
-SeaGen-
  • World’s first large scale commercial tidal stream generator.
  • First one was installed in the Strangford Narrows (Ireland)
  • Generates 1.2MW between 18-20 hours a day
  • Blades span 16 meters in diameter
  • http://www.energysavers. gov/renewable_energy/ocean/index.cfm/mytopic=50009
barrage tidal power rance power station
-Barrage Tidal Power: Rance Power Station-
  • Located on Rance River, France
      • 750 meters long
      • 24 Turbines
      • Capacity of 240MW
      • Annual output of 600GWh
      • Supplies 0.012% of Frances power supply.
      • Opened 1966
  • http://www.energysavers. gov/renewable_energy/ocean/index.cfm/mytopic=50009
calculations tidal stream generators
-Calculations: Tidal Stream Generators-

P = the power generated (in watts)

ξ = the turbine efficiency

ρ = the density of the water (seawater is 1025 kg/m³)

A = the sweep area of the turbine (in m²)

V = the velocity of the flow

*Power equation is based on the kinetic energy of the moving water*

calculation barrage tidal power
-Calculation: Barrage Tidal Power-
  • E = energy
  • ρ = the density of the water (seawater is 1025 kg/m³)
  • A = horizontal area of the barrage basin
  • G = Gravity (9.81m/s2)
  • H = Vertical Tide Range

* The potential energy available from a barrage is dependent on * the volume of water.

environmental impact
-Environmental Impact-
  • Mortality rates of fish swimming threw the turbine is around 15%
      • Sonic guidance to get fish to avoid the turbine
  • Placement of barrage turbines into estuaries can change entire ecosystems
      • Alters flow of saltwater possibly changing hydrology & salinity
      • Sediment movement also can effect the ecosystem
comparison to wind energy
-Comparison to Wind Energy-
  • Tidal Stream generators draw energy in the same basic way wind turbines do
  • Higher density of water allows a single generator to provide significantly more power
  • Water speeds of nearly 1/10 the speed of wind can provide the same energy output
  • Current in water is much more reliable then wind in the air.
economics of tidal power
-Economics of Tidal Power-
  • The cost of building a Tidal Power plant can have a high capital cost.
  • UK: $15 Billion
      • 8000MW
  • Philippines: $3 Billion
      • 2200MW
  • Operating costs are low and usually come from maintenance
what you can do
-What You Can Do-
  • In the Amazon helical turbine technology are being used to generate small scale electricity for rural communities.
  • rural residents are dispersed and cannot be reached economically by power lines from central generators.
  • The only decentralized options available to them now are: solar panels and diesel generation.

Configuration:

  • The helical turbine rotates on a shaft with a pulley that runs an alternator by means of a belt.
  • The alternator charges batteries
amazon project
-Amazon Project-

(b) Pulley and belt

(c) Automotive alternator

(a) 6-blade helical turbine

www.globalcoral.org/UNCSD%20SUMMARY.ppt

amazon project1
-Amazon Project-
  • Energy production: 120 A-h/day
  • 8 solar panels (75 Wp), installed: US$ 5690
  • Tide-Energy generating station: US$ 2800
  • Numbers on: Annual operating costs (120 A-h/day)*
    • 1000 VA diesel generator: US$ 1397
    • Tide-Energy generating station: US$ 824

* Includes fuel, labor, maintenance, and depreciation

  • For a single Tide-Energy generating station:
    • Annual Receipts (charging 5 batteries/day) 1750
    • Costs (labor, maintenance, and depreciation) 824
    • Profit US$ 926
wave power
-Wave Power-
  • Salter’s Duck design
      • Could stop 90% of wave motion and could convert 90% of that to electricity
      • Shut down because of an error in calculating the cost, which wasn’t discovered until 2008, and the program had been shut down in 1982
how it works
-How it Works-
  • The “duck” device bobs back and forth as waves pass, this motion moves a pendulum that is connected to a generator that produces electricity

http://www.permaculture.org.au/images/ocean_power_salters_duck.gif

some companies
-Some Companies-
  • Some companies designing mechanisms
        • Wavegen
          • Limpet
        • Ocean Power Delivery
          • Pelamis tube
        • Renewable Energy Holdings
          • CETO
        • Oyster Wave Energy devices
advantages and disadvantages
-Advantages and Disadvantages-
  • Advantages
        • The energy is free – no fuel needed, no waste produced
        • Not expensive to operate and maintain
        • Can produce a great deal of energy
  • Disadvantages
        • Depends on the waves – sometimes you’ll get loads of energy, sometimes almost nothing
        • Needs a suitable site, where waves are consistently strong
        • Some designs are noisy. But then again, so are waves, so any noise is unlikely to be a problem
        • Must be able to withstand
environmental impact1
-Environmental Impact-
  • Noise pollution
  • Displace productive fishing sites
  • Change the pattern of beach sand nourishment
  • Alter food chains and disrupt migration patterns
  • Offshore devices will displace bottom-dwelling organisms where they connect into the
sources
-Sources-
  • (2006). Tidal Energy Industry Boom. Retrieved http://www.alternative-energy-news.info/tidal-energy-industry-boom/
  • (2008). Renewable Energy: Ocean Wave Power. Retrieved http://www.energysavers. gov/renewable_energy/ocean/index.cfm/mytopic=50009
  • (2009) Ocean Wave Energy. Retrieved http://ocsenergy.anl.gov/guide/wave/index.cfm
  • (2010). America’s Premiere Wave Power Farm Sets Sail. Retrieved http://www. alternative-energy-news.info/wave-power-farm-sets-sail/
  • (2010). History of Tidal Energy. Retrieved. http://www.google.com/#q=history+of+tidal+energy&hl=en&tbs=tl :1&tbo=u&ei=nPavS6aeAYH48Ab-q6y9Dw&sa=X&oi =timeline_result&ct=title&resnum=11&ved=0CDgQ5wIwCg&fp=1&cad=b
  • Kirke, B. (2006) Developments in ducted water current turbines. Retrieved http://www.cyberiad.net/library/pdf/bk_tidal_paper25apr06.pdf
  • Lamb, H. (1994) Hydrodynamics. England. Cambridge University Press.
  • Meyer, R. (2009). Tidal energy . Retrieved from http://www.oceanenergycouncil.com/ index.php/Tidal-Energy/Tidal-Energy.html
  • Tayor, P. (2007). Seagen Tidal Power Installation. Retrieved http://www.alternative-energy-news.info/seagen-tidal-power-installation/
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